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            <h1 id="seo-header">『Java』JAVA连接Excel最好用的开源项目EasyExcel,官方使用文档及.jar包下载</h1>
            
            
              <div class="markdown-body">
                
                <h1 id="『Java』JAVA-连接-Excel-最好用的开源项目-EasyExcel-官方使用文档及-jar-包下载"><a href="#『Java』JAVA-连接-Excel-最好用的开源项目-EasyExcel-官方使用文档及-jar-包下载" class="headerlink" title="『Java』JAVA 连接 Excel 最好用的开源项目 EasyExcel,官方使用文档及.jar 包下载"></a>『Java』JAVA 连接 Excel 最好用的开源项目 EasyExcel,官方使用文档及.jar 包下载</h1><blockquote>
<p>EasyExcel 是一个基于 Java 的简单、省内存的读写 Excel 的开源项目。在尽可能节约内存的情况下支持读写百 M 的 Excel。</p>
</blockquote>
<blockquote>
<p>github 地址:<a target="_blank" rel="noopener" href="https://github.com/alibaba/easyexcel">https://github.com/alibaba/easyexcel</a><br>开源项目不容易，如果觉得本项目对您的工作还是有帮助的话，请在帮忙在 github star 点个 ★Star。</p>
</blockquote>
<p>我使用后，觉得阿里确实很用心，使用简单，速度还快，这个 ⭐ 可以给。<br><strong>如果以下内容还是看不懂，给他们点个小星星，然后我教你，嘻嘻。</strong></p>
<p>jar 下载地址：<a target="_blank" rel="noopener" href="https://share.weiyun.com/5ADw1oz">https://share.weiyun.com/5ADw1oz</a></p>
<h3 id="读-excel-的-DEMO-文档"><a href="#读-excel-的-DEMO-文档" class="headerlink" title="读 excel 的 DEMO 文档"></a>读 excel 的 DEMO 文档</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span 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class="line">238</span><br><span class="line">239</span><br><span class="line">240</span><br><span class="line">241</span><br><span class="line">242</span><br><span class="line">243</span><br><span class="line">244</span><br><span class="line">245</span><br><span class="line">246</span><br><span class="line">247</span><br><span class="line">248</span><br><span class="line">249</span><br><span class="line">250</span><br><span class="line">251</span><br><span class="line">252</span><br><span class="line">253</span><br><span class="line">254</span><br><span class="line">255</span><br><span class="line">256</span><br><span class="line">257</span><br></pre></td><td class="code"><pre><code class="hljs java"><span class="hljs-keyword">package</span> com.alibaba.easyexcel.test.demo.read;<br><br><span class="hljs-keyword">import</span> java.io.File;<br><span class="hljs-keyword">import</span> java.util.List;<br><span class="hljs-keyword">import</span> java.util.Map;<br><br><span class="hljs-keyword">import</span> org.junit.Ignore;<br><span class="hljs-keyword">import</span> org.junit.Test;<br><span class="hljs-keyword">import</span> org.slf4j.Logger;<br><span class="hljs-keyword">import</span> org.slf4j.LoggerFactory;<br><br><span class="hljs-keyword">import</span> com.alibaba.easyexcel.test.util.TestFileUtil;<br><span class="hljs-keyword">import</span> com.alibaba.excel.EasyExcel;<br><span class="hljs-keyword">import</span> com.alibaba.excel.ExcelReader;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.ExcelProperty;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.format.DateTimeFormat;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.format.NumberFormat;<br><span class="hljs-keyword">import</span> com.alibaba.excel.converters.DefaultConverterLoader;<br><span class="hljs-keyword">import</span> com.alibaba.excel.enums.CellExtraTypeEnum;<br><span class="hljs-keyword">import</span> com.alibaba.excel.read.metadata.ReadSheet;<br><span class="hljs-keyword">import</span> com.alibaba.fastjson.JSON;<br><br><span class="hljs-comment">/**</span><br><span class="hljs-comment"> * 读的常见写法</span><br><span class="hljs-comment"> *</span><br><span class="hljs-comment"> * <span class="hljs-doctag">@author</span> Jiaju Zhuang</span><br><span class="hljs-comment"> */</span><br><span class="hljs-meta">@Ignore</span><br><span class="hljs-keyword">public</span> <span class="hljs-keyword">class</span> <span class="hljs-title class_">ReadTest</span> &#123;<br>    <span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">final</span> <span class="hljs-type">Logger</span> <span class="hljs-variable">LOGGER</span> <span class="hljs-operator">=</span> LoggerFactory.getLogger(ReadTest.class);<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 最简单的读</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> DemoDataListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接读即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">simpleRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-comment">// 有个很重要的点 DemoDataListener 不能被spring管理，要每次读取excel都要new,然后里面用到spring可以构造方法传进去</span><br>        <span class="hljs-comment">// 写法1：</span><br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定读用哪个class去读，然后读取第一个sheet 文件流会自动关闭</span><br>        EasyExcel.read(fileName, DemoData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoDataListener</span>()).sheet().doRead();<br><br>        <span class="hljs-comment">// 写法2：</span><br>        fileName = TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-type">ExcelReader</span> <span class="hljs-variable">excelReader</span> <span class="hljs-operator">=</span> EasyExcel.read(fileName, DemoData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoDataListener</span>()).build();<br>        <span class="hljs-type">ReadSheet</span> <span class="hljs-variable">readSheet</span> <span class="hljs-operator">=</span> EasyExcel.readSheet(<span class="hljs-number">0</span>).build();<br>        excelReader.read(readSheet);<br>        <span class="hljs-comment">// 这里千万别忘记关闭，读的时候会创建临时文件，到时磁盘会崩的</span><br>        excelReader.finish();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 指定列的下标或者列名</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象,并使用&#123;<span class="hljs-doctag">@link</span> ExcelProperty&#125;注解. 参照&#123;<span class="hljs-doctag">@link</span> IndexOrNameData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> IndexOrNameDataListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接读即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">indexOrNameRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里默认读取第一个sheet</span><br>        EasyExcel.read(fileName, IndexOrNameData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">IndexOrNameDataListener</span>()).sheet().doRead();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 读多个或者全部sheet,这里注意一个sheet不能读取多次，多次读取需要重新读取文件</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> DemoDataListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接读即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">repeatedRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 读取全部sheet</span><br>        <span class="hljs-comment">// 这里需要注意 DemoDataListener的doAfterAllAnalysed 会在每个sheet读取完毕后调用一次。然后所有sheet都会往同一个DemoDataListener里面写</span><br>        EasyExcel.read(fileName, DemoData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoDataListener</span>()).doReadAll();<br><br>        <span class="hljs-comment">// 读取部分sheet</span><br>        fileName = TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-type">ExcelReader</span> <span class="hljs-variable">excelReader</span> <span class="hljs-operator">=</span> EasyExcel.read(fileName).build();<br>        <span class="hljs-comment">// 这里为了简单 所以注册了 同样的head 和Listener 自己使用功能必须不同的Listener</span><br>        <span class="hljs-type">ReadSheet</span> <span class="hljs-variable">readSheet1</span> <span class="hljs-operator">=</span><br>            EasyExcel.readSheet(<span class="hljs-number">0</span>).head(DemoData.class).registerReadListener(<span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoDataListener</span>()).build();<br>        <span class="hljs-type">ReadSheet</span> <span class="hljs-variable">readSheet2</span> <span class="hljs-operator">=</span><br>            EasyExcel.readSheet(<span class="hljs-number">1</span>).head(DemoData.class).registerReadListener(<span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoDataListener</span>()).build();<br>        <span class="hljs-comment">// 这里注意 一定要把sheet1 sheet2 一起传进去，不然有个问题就是03版的excel 会读取多次，浪费性能</span><br>        excelReader.read(readSheet1, readSheet2);<br>        <span class="hljs-comment">// 这里千万别忘记关闭，读的时候会创建临时文件，到时磁盘会崩的</span><br>        excelReader.finish();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 日期、数字或者自定义格式转换</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 默认读的转换器&#123;<span class="hljs-doctag">@link</span> DefaultConverterLoader#loadDefaultReadConverter()&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> ConverterData&#125;.里面可以使用注解&#123;<span class="hljs-doctag">@link</span> DateTimeFormat&#125;、&#123;<span class="hljs-doctag">@link</span> NumberFormat&#125;或者自定义注解</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> ConverterDataListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接读即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">converterRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定读用哪个class去读，然后读取第一个sheet</span><br>        EasyExcel.read(fileName, ConverterData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">ConverterDataListener</span>())<br>            <span class="hljs-comment">// 这里注意 我们也可以registerConverter来指定自定义转换器， 但是这个转换变成全局了， 所有java为string,excel为string的都会用这个转换器。</span><br>            <span class="hljs-comment">// 如果就想单个字段使用请使用@ExcelProperty 指定converter</span><br>            <span class="hljs-comment">// .registerConverter(new CustomStringStringConverter())</span><br>            <span class="hljs-comment">// 读取sheet</span><br>            .sheet().doRead();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 多行头</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> DemoDataListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 设置headRowNumber参数，然后读。 这里要注意headRowNumber如果不指定， 会根据你传入的class的&#123;<span class="hljs-doctag">@link</span> ExcelProperty#value()&#125;里面的表头的数量来决定行数，</span><br><span class="hljs-comment">     * 如果不传入class则默认为1.当然你指定了headRowNumber不管是否传入class都是以你传入的为准。</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">complexHeaderRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定读用哪个class去读，然后读取第一个sheet</span><br>        EasyExcel.read(fileName, DemoData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoDataListener</span>()).sheet()<br>            <span class="hljs-comment">// 这里可以设置1，因为头就是一行。如果多行头，可以设置其他值。不传入也可以，因为默认会根据DemoData 来解析，他没有指定头，也就是默认1行</span><br>            .headRowNumber(<span class="hljs-number">1</span>).doRead();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 读取表头数据</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> DemoHeadDataListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接读即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">headerRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定读用哪个class去读，然后读取第一个sheet</span><br>        EasyExcel.read(fileName, DemoData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoHeadDataListener</span>()).sheet().doRead();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 额外信息（批注、超链接、合并单元格信息读取）</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 由于是流式读取，没法在读取到单元格数据的时候直接读取到额外信息，所以只能最后通知哪些单元格有哪些额外信息</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoExtraData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认异步读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> DemoExtraListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接读即可</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * <span class="hljs-doctag">@since</span> 2.2.0-beat1</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">extraRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;extra.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定读用哪个class去读，然后读取第一个sheet</span><br>        EasyExcel.read(fileName, DemoExtraData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoExtraListener</span>())<br>            <span class="hljs-comment">// 需要读取批注 默认不读取</span><br>            .extraRead(CellExtraTypeEnum.COMMENT)<br>            <span class="hljs-comment">// 需要读取超链接 默认不读取</span><br>            .extraRead(CellExtraTypeEnum.HYPERLINK)<br>            <span class="hljs-comment">// 需要读取合并单元格信息 默认不读取</span><br>            .extraRead(CellExtraTypeEnum.MERGE).sheet().doRead();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 读取公式和单元格类型</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> CellDataReadDemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> DemoHeadDataListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接读即可</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * <span class="hljs-doctag">@since</span> 2.2.0-beat1</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">cellDataRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;cellDataDemo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定读用哪个class去读，然后读取第一个sheet</span><br>        EasyExcel.read(fileName, CellDataReadDemoData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">CellDataDemoHeadDataListener</span>()).sheet().doRead();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 数据转换等异常处理</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> ExceptionDemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 由于默认一行行的读取excel，所以需要创建excel一行一行的回调监听器，参照&#123;<span class="hljs-doctag">@link</span> DemoExceptionListener&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接读即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">exceptionRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定读用哪个class去读，然后读取第一个sheet</span><br>        EasyExcel.read(fileName, ExceptionDemoData.class, <span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoExceptionListener</span>()).sheet().doRead();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 同步的返回，不推荐使用，如果数据量大会把数据放到内存里面</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">synchronousRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定读用哪个class去读，然后读取第一个sheet 同步读取会自动finish</span><br>        List&lt;DemoData&gt; list = EasyExcel.read(fileName).head(DemoData.class).sheet().doReadSync();<br>        <span class="hljs-keyword">for</span> (DemoData data : list) &#123;<br>            LOGGER.info(<span class="hljs-string">&quot;读取到数据:&#123;&#125;&quot;</span>, JSON.toJSONString(data));<br>        &#125;<br><br>        <span class="hljs-comment">// 这里 也可以不指定class，返回一个list，然后读取第一个sheet 同步读取会自动finish</span><br>        List&lt;Map&lt;Integer, String&gt;&gt; listMap = EasyExcel.read(fileName).sheet().doReadSync();<br>        <span class="hljs-keyword">for</span> (Map&lt;Integer, String&gt; data : listMap) &#123;<br>            <span class="hljs-comment">// 返回每条数据的键值对 表示所在的列 和所在列的值</span><br>            LOGGER.info(<span class="hljs-string">&quot;读取到数据:&#123;&#125;&quot;</span>, JSON.toJSONString(data));<br>        &#125;<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 不创建对象的读</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">noModelRead</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 只要，然后读取第一个sheet 同步读取会自动finish</span><br>        EasyExcel.read(fileName, <span class="hljs-keyword">new</span> <span class="hljs-title class_">NoModelDataListener</span>()).sheet().doRead();<br>    &#125;<br>&#125;<br></code></pre></td></tr></table></figure>

<h3 id="写-excel-的-DEMO-文档"><a href="#写-excel-的-DEMO-文档" class="headerlink" title="写 excel 的 DEMO 文档"></a>写 excel 的 DEMO 文档</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span 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class="line">538</span><br><span class="line">539</span><br><span class="line">540</span><br><span class="line">541</span><br><span class="line">542</span><br><span class="line">543</span><br><span class="line">544</span><br><span class="line">545</span><br><span class="line">546</span><br><span class="line">547</span><br><span class="line">548</span><br><span class="line">549</span><br><span class="line">550</span><br><span class="line">551</span><br><span class="line">552</span><br></pre></td><td class="code"><pre><code class="hljs java"><span class="hljs-keyword">package</span> com.alibaba.easyexcel.test.demo.write;<br><br><span class="hljs-keyword">import</span> java.io.File;<br><span class="hljs-keyword">import</span> java.io.InputStream;<br><span class="hljs-keyword">import</span> java.net.URL;<br><span class="hljs-keyword">import</span> java.util.ArrayList;<br><span class="hljs-keyword">import</span> java.util.Date;<br><span class="hljs-keyword">import</span> java.util.HashSet;<br><span class="hljs-keyword">import</span> java.util.List;<br><span class="hljs-keyword">import</span> java.util.Set;<br><br><span class="hljs-keyword">import</span> org.apache.poi.ss.usermodel.FillPatternType;<br><span class="hljs-keyword">import</span> org.apache.poi.ss.usermodel.IndexedColors;<br><span class="hljs-keyword">import</span> org.apache.poi.xssf.streaming.SXSSFSheet;<br><span class="hljs-keyword">import</span> org.junit.Ignore;<br><span class="hljs-keyword">import</span> org.junit.Test;<br><br><span class="hljs-keyword">import</span> com.alibaba.easyexcel.test.util.TestFileUtil;<br><span class="hljs-keyword">import</span> com.alibaba.excel.EasyExcel;<br><span class="hljs-keyword">import</span> com.alibaba.excel.ExcelWriter;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.ExcelProperty;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.format.DateTimeFormat;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.format.NumberFormat;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.write.style.ColumnWidth;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.write.style.ContentRowHeight;<br><span class="hljs-keyword">import</span> com.alibaba.excel.annotation.write.style.HeadRowHeight;<br><span class="hljs-keyword">import</span> com.alibaba.excel.util.FileUtils;<br><span class="hljs-keyword">import</span> com.alibaba.excel.write.merge.LoopMergeStrategy;<br><span class="hljs-keyword">import</span> com.alibaba.excel.write.metadata.WriteSheet;<br><span class="hljs-keyword">import</span> com.alibaba.excel.write.metadata.WriteTable;<br><span class="hljs-keyword">import</span> com.alibaba.excel.write.metadata.style.WriteCellStyle;<br><span class="hljs-keyword">import</span> com.alibaba.excel.write.metadata.style.WriteFont;<br><span class="hljs-keyword">import</span> com.alibaba.excel.write.style.HorizontalCellStyleStrategy;<br><span class="hljs-keyword">import</span> com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;<br><br><span class="hljs-comment">/**</span><br><span class="hljs-comment"> * 写的常见写法</span><br><span class="hljs-comment"> *</span><br><span class="hljs-comment"> * <span class="hljs-doctag">@author</span> Jiaju Zhuang</span><br><span class="hljs-comment"> */</span><br><span class="hljs-meta">@Ignore</span><br><span class="hljs-keyword">public</span> <span class="hljs-keyword">class</span> <span class="hljs-title class_">WriteTest</span> &#123;<br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 最简单的写</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">simpleWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-comment">// 写法1</span><br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;simpleWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        <span class="hljs-comment">// 如果这里想使用03 则 传入excelType参数即可</span><br>        EasyExcel.write(fileName, DemoData.class).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br><br>        <span class="hljs-comment">// 写法2</span><br>        fileName = TestFileUtil.getPath() + <span class="hljs-string">&quot;simpleWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写</span><br>        <span class="hljs-type">ExcelWriter</span> <span class="hljs-variable">excelWriter</span> <span class="hljs-operator">=</span> EasyExcel.write(fileName, DemoData.class).build();<br>        <span class="hljs-type">WriteSheet</span> <span class="hljs-variable">writeSheet</span> <span class="hljs-operator">=</span> EasyExcel.writerSheet(<span class="hljs-string">&quot;模板&quot;</span>).build();<br>        excelWriter.write(data(), writeSheet);<br>        <span class="hljs-comment">/// 千万别忘记finish 会帮忙关闭流</span><br>        excelWriter.finish();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 根据参数只导出指定列</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 根据自己或者排除自己需要的列</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * <span class="hljs-doctag">@since</span> 2.1.1</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">excludeOrIncludeWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;excludeOrIncludeWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br><br>        <span class="hljs-comment">// 根据用户传入字段 假设我们要忽略 date</span><br>        Set&lt;String&gt; excludeColumnFiledNames = <span class="hljs-keyword">new</span> <span class="hljs-title class_">HashSet</span>&lt;String&gt;();<br>        excludeColumnFiledNames.add(<span class="hljs-string">&quot;date&quot;</span>);<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, DemoData.class).excludeColumnFiledNames(excludeColumnFiledNames).sheet(<span class="hljs-string">&quot;模板&quot;</span>)<br>            .doWrite(data());<br><br>        fileName = TestFileUtil.getPath() + <span class="hljs-string">&quot;excludeOrIncludeWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 根据用户传入字段 假设我们只要导出 date</span><br>        Set&lt;String&gt; includeColumnFiledNames = <span class="hljs-keyword">new</span> <span class="hljs-title class_">HashSet</span>&lt;String&gt;();<br>        includeColumnFiledNames.add(<span class="hljs-string">&quot;date&quot;</span>);<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, DemoData.class).includeColumnFiledNames(includeColumnFiledNames).sheet(<span class="hljs-string">&quot;模板&quot;</span>)<br>            .doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 指定写入的列</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> IndexData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 使用&#123;<span class="hljs-doctag">@link</span> ExcelProperty&#125;注解指定写入的列</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">indexWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;indexWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, IndexData.class).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 复杂头写入</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> ComplexHeadData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 使用&#123;<span class="hljs-doctag">@link</span> ExcelProperty&#125;注解指定复杂的头</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">complexHeadWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;complexHeadWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, ComplexHeadData.class).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 重复多次写入</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> ComplexHeadData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 使用&#123;<span class="hljs-doctag">@link</span> ExcelProperty&#125;注解指定复杂的头</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接调用二次写入即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">repeatedWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-comment">// 方法1 如果写到同一个sheet</span><br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;repeatedWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写</span><br>        <span class="hljs-type">ExcelWriter</span> <span class="hljs-variable">excelWriter</span> <span class="hljs-operator">=</span> EasyExcel.write(fileName, DemoData.class).build();<br>        <span class="hljs-comment">// 这里注意 如果同一个sheet只要创建一次</span><br>        <span class="hljs-type">WriteSheet</span> <span class="hljs-variable">writeSheet</span> <span class="hljs-operator">=</span> EasyExcel.writerSheet(<span class="hljs-string">&quot;模板&quot;</span>).build();<br>        <span class="hljs-comment">// 去调用写入,这里我调用了五次，实际使用时根据数据库分页的总的页数来</span><br>        <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">i</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">5</span>; i++) &#123;<br>            <span class="hljs-comment">// 分页去数据库查询数据 这里可以去数据库查询每一页的数据</span><br>            List&lt;DemoData&gt; data = data();<br>            excelWriter.write(data, writeSheet);<br>        &#125;<br>        <span class="hljs-comment">/// 千万别忘记finish 会帮忙关闭流</span><br>        excelWriter.finish();<br><br>        <span class="hljs-comment">// 方法2 如果写到不同的sheet 同一个对象</span><br>        fileName = TestFileUtil.getPath() + <span class="hljs-string">&quot;repeatedWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 指定文件</span><br>        excelWriter = EasyExcel.write(fileName, DemoData.class).build();<br>        <span class="hljs-comment">// 去调用写入,这里我调用了五次，实际使用时根据数据库分页的总的页数来。这里最终会写到5个sheet里面</span><br>        <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">i</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">5</span>; i++) &#123;<br>            <span class="hljs-comment">// 每次都要创建writeSheet 这里注意必须指定sheetNo 而且sheetName必须不一样</span><br>            writeSheet = EasyExcel.writerSheet(i, <span class="hljs-string">&quot;模板&quot;</span> + i).build();<br>            <span class="hljs-comment">// 分页去数据库查询数据 这里可以去数据库查询每一页的数据</span><br>            List&lt;DemoData&gt; data = data();<br>            excelWriter.write(data, writeSheet);<br>        &#125;<br>        <span class="hljs-comment">/// 千万别忘记finish 会帮忙关闭流</span><br>        excelWriter.finish();<br><br>        <span class="hljs-comment">// 方法3 如果写到不同的sheet 不同的对象</span><br>        fileName = TestFileUtil.getPath() + <span class="hljs-string">&quot;repeatedWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 指定文件</span><br>        excelWriter = EasyExcel.write(fileName).build();<br>        <span class="hljs-comment">// 去调用写入,这里我调用了五次，实际使用时根据数据库分页的总的页数来。这里最终会写到5个sheet里面</span><br>        <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">i</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">5</span>; i++) &#123;<br>            <span class="hljs-comment">// 每次都要创建writeSheet 这里注意必须指定sheetNo 而且sheetName必须不一样。这里注意DemoData.class 可以每次都变，我这里为了方便 所以用的同一个class 实际上可以一直变</span><br>            writeSheet = EasyExcel.writerSheet(i, <span class="hljs-string">&quot;模板&quot;</span> + i).head(DemoData.class).build();<br>            <span class="hljs-comment">// 分页去数据库查询数据 这里可以去数据库查询每一页的数据</span><br>            List&lt;DemoData&gt; data = data();<br>            excelWriter.write(data, writeSheet);<br>        &#125;<br>        <span class="hljs-comment">/// 千万别忘记finish 会帮忙关闭流</span><br>        excelWriter.finish();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 日期、数字或者自定义格式转换</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> ConverterData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 使用&#123;<span class="hljs-doctag">@link</span> ExcelProperty&#125;配合使用注解&#123;<span class="hljs-doctag">@link</span> DateTimeFormat&#125;、&#123;<span class="hljs-doctag">@link</span> NumberFormat&#125;或者自定义注解</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">converterWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;converterWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, ConverterData.class).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 图片导出</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> ImageData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">imageWrite</span><span class="hljs-params">()</span> <span class="hljs-keyword">throws</span> Exception &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;imageWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 如果使用流 记得关闭</span><br>        <span class="hljs-type">InputStream</span> <span class="hljs-variable">inputStream</span> <span class="hljs-operator">=</span> <span class="hljs-literal">null</span>;<br>        <span class="hljs-keyword">try</span> &#123;<br>            List&lt;ImageData&gt; list = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;ImageData&gt;();<br>            <span class="hljs-type">ImageData</span> <span class="hljs-variable">imageData</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">ImageData</span>();<br>            list.add(imageData);<br>            <span class="hljs-type">String</span> <span class="hljs-variable">imagePath</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;converter&quot;</span> + File.separator + <span class="hljs-string">&quot;img.jpg&quot;</span>;<br>            <span class="hljs-comment">// 放入五种类型的图片 实际使用只要选一种即可</span><br>            imageData.setByteArray(FileUtils.readFileToByteArray(<span class="hljs-keyword">new</span> <span class="hljs-title class_">File</span>(imagePath)));<br>            imageData.setFile(<span class="hljs-keyword">new</span> <span class="hljs-title class_">File</span>(imagePath));<br>            imageData.setString(imagePath);<br>            inputStream = FileUtils.openInputStream(<span class="hljs-keyword">new</span> <span class="hljs-title class_">File</span>(imagePath));<br>            imageData.setInputStream(inputStream);<br>            imageData.setUrl(<span class="hljs-keyword">new</span> <span class="hljs-title class_">URL</span>(<br>                <span class="hljs-string">&quot;https://raw.githubusercontent.com/alibaba/easyexcel/master/src/test/resources/converter/img.jpg&quot;</span>));<br>            EasyExcel.write(fileName, ImageData.class).sheet().doWrite(list);<br>        &#125; <span class="hljs-keyword">finally</span> &#123;<br>            <span class="hljs-keyword">if</span> (inputStream != <span class="hljs-literal">null</span>) &#123;<br>                inputStream.close();<br>            &#125;<br>        &#125;<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 根据模板写入</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> IndexData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 使用&#123;<span class="hljs-doctag">@link</span> ExcelProperty&#125;注解指定写入的列</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 使用withTemplate 写取模板</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 4. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">templateWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">templateFileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;demo&quot;</span> + File.separator + <span class="hljs-string">&quot;demo.xlsx&quot;</span>;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;templateWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, DemoData.class).withTemplate(templateFileName).sheet().doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 列宽、行高</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> WidthAndHeightData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 使用注解&#123;<span class="hljs-doctag">@link</span> ColumnWidth&#125;、&#123;<span class="hljs-doctag">@link</span> HeadRowHeight&#125;、&#123;<span class="hljs-doctag">@link</span> ContentRowHeight&#125;指定宽度或高度</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">widthAndHeightWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;widthAndHeightWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, WidthAndHeightData.class).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 注解形式自定义样式</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoStyleData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * <span class="hljs-doctag">@since</span> 2.2.0-beta1</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">annotationStyleWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;annotationStyleWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, DemoStyleData.class).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 拦截器形式自定义样式</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 创建一个style策略 并注册</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">handlerStyleWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;handlerStyleWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 头的策略</span><br>        <span class="hljs-type">WriteCellStyle</span> <span class="hljs-variable">headWriteCellStyle</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">WriteCellStyle</span>();<br>        <span class="hljs-comment">// 背景设置为红色</span><br>        headWriteCellStyle.setFillForegroundColor(IndexedColors.RED.getIndex());<br>        <span class="hljs-type">WriteFont</span> <span class="hljs-variable">headWriteFont</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">WriteFont</span>();<br>        headWriteFont.setFontHeightInPoints((<span class="hljs-type">short</span>)<span class="hljs-number">20</span>);<br>        headWriteCellStyle.setWriteFont(headWriteFont);<br>        <span class="hljs-comment">// 内容的策略</span><br>        <span class="hljs-type">WriteCellStyle</span> <span class="hljs-variable">contentWriteCellStyle</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">WriteCellStyle</span>();<br>        <span class="hljs-comment">// 这里需要指定 FillPatternType 为FillPatternType.SOLID_FOREGROUND 不然无法显示背景颜色.头默认了 FillPatternType所以可以不指定</span><br>        contentWriteCellStyle.setFillPatternType(FillPatternType.SOLID_FOREGROUND);<br>        <span class="hljs-comment">// 背景绿色</span><br>        contentWriteCellStyle.setFillForegroundColor(IndexedColors.GREEN.getIndex());<br>        <span class="hljs-type">WriteFont</span> <span class="hljs-variable">contentWriteFont</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">WriteFont</span>();<br>        <span class="hljs-comment">// 字体大小</span><br>        contentWriteFont.setFontHeightInPoints((<span class="hljs-type">short</span>)<span class="hljs-number">20</span>);<br>        contentWriteCellStyle.setWriteFont(contentWriteFont);<br>        <span class="hljs-comment">// 这个策略是 头是头的样式 内容是内容的样式 其他的策略可以自己实现</span><br>        <span class="hljs-type">HorizontalCellStyleStrategy</span> <span class="hljs-variable">horizontalCellStyleStrategy</span> <span class="hljs-operator">=</span><br>            <span class="hljs-keyword">new</span> <span class="hljs-title class_">HorizontalCellStyleStrategy</span>(headWriteCellStyle, contentWriteCellStyle);<br><br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, DemoData.class).registerWriteHandler(horizontalCellStyleStrategy).sheet(<span class="hljs-string">&quot;模板&quot;</span>)<br>            .doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 合并单元格</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125; &#123;<span class="hljs-doctag">@link</span> DemoMergeData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 创建一个merge策略 并注册</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * <span class="hljs-doctag">@since</span> 2.2.0-beta1</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">mergeWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-comment">// 方法1 注解</span><br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;mergeWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 在DemoStyleData里面加上ContentLoopMerge注解</span><br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, DemoMergeData.class).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br><br>        <span class="hljs-comment">// 方法2 自定义合并单元格策略</span><br>        fileName = TestFileUtil.getPath() + <span class="hljs-string">&quot;mergeWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 每隔2行会合并 把eachColumn 设置成 3 也就是我们数据的长度，所以就第一列会合并。当然其他合并策略也可以自己写</span><br>        <span class="hljs-type">LoopMergeStrategy</span> <span class="hljs-variable">loopMergeStrategy</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">LoopMergeStrategy</span>(<span class="hljs-number">2</span>, <span class="hljs-number">0</span>);<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, DemoData.class).registerWriteHandler(loopMergeStrategy).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 使用table去写入</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 然后写入table即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">tableWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;tableWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里直接写多个table的案例了，如果只有一个 也可以直一行代码搞定，参照其他案例</span><br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写</span><br>        <span class="hljs-type">ExcelWriter</span> <span class="hljs-variable">excelWriter</span> <span class="hljs-operator">=</span> EasyExcel.write(fileName, DemoData.class).build();<br>        <span class="hljs-comment">// 把sheet设置为不需要头 不然会输出sheet的头 这样看起来第一个table 就有2个头了</span><br>        <span class="hljs-type">WriteSheet</span> <span class="hljs-variable">writeSheet</span> <span class="hljs-operator">=</span> EasyExcel.writerSheet(<span class="hljs-string">&quot;模板&quot;</span>).needHead(Boolean.FALSE).build();<br>        <span class="hljs-comment">// 这里必须指定需要头，table 会继承sheet的配置，sheet配置了不需要，table 默认也是不需要</span><br>        <span class="hljs-type">WriteTable</span> <span class="hljs-variable">writeTable0</span> <span class="hljs-operator">=</span> EasyExcel.writerTable(<span class="hljs-number">0</span>).needHead(Boolean.TRUE).build();<br>        <span class="hljs-type">WriteTable</span> <span class="hljs-variable">writeTable1</span> <span class="hljs-operator">=</span> EasyExcel.writerTable(<span class="hljs-number">1</span>).needHead(Boolean.TRUE).build();<br>        <span class="hljs-comment">// 第一次写入会创建头</span><br>        excelWriter.write(data(), writeSheet, writeTable0);<br>        <span class="hljs-comment">// 第二次写如也会创建头，然后在第一次的后面写入数据</span><br>        excelWriter.write(data(), writeSheet, writeTable1);<br>        <span class="hljs-comment">/// 千万别忘记finish 会帮忙关闭流</span><br>        excelWriter.finish();<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 动态头，实时生成头写入</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 思路是这样子的，先创建List&lt;String&gt;头格式的sheet仅仅写入头,然后通过table 不写入头的方式 去写入数据</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 然后写入table即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">dynamicHeadWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;dynamicHeadWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        EasyExcel.write(fileName)<br>            <span class="hljs-comment">// 这里放入动态头</span><br>            .head(head()).sheet(<span class="hljs-string">&quot;模板&quot;</span>)<br>            <span class="hljs-comment">// 当然这里数据也可以用 List&lt;List&lt;String&gt;&gt; 去传入</span><br>            .doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 自动列宽(不太精确)</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 这个目前不是很好用，比如有数字就会导致换行。而且长度也不是刚好和实际长度一致。 所以需要精确到刚好列宽的慎用。 当然也可以自己参照</span><br><span class="hljs-comment">     * &#123;<span class="hljs-doctag">@link</span> LongestMatchColumnWidthStyleStrategy&#125;重新实现.</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * poi 自带&#123;<span class="hljs-doctag">@link</span> SXSSFSheet#autoSizeColumn(int)&#125; 对中文支持也不太好。目前没找到很好的算法。 有的话可以推荐下。</span><br><span class="hljs-comment">     *</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> LongestMatchColumnWidthData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 注册策略&#123;<span class="hljs-doctag">@link</span> LongestMatchColumnWidthStyleStrategy&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 3. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">longestMatchColumnWidthWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span><br>            TestFileUtil.getPath() + <span class="hljs-string">&quot;longestMatchColumnWidthWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, LongestMatchColumnWidthData.class)<br>            .registerWriteHandler(<span class="hljs-keyword">new</span> <span class="hljs-title class_">LongestMatchColumnWidthStyleStrategy</span>()).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(dataLong());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 下拉，超链接等自定义拦截器（上面几点都不符合但是要对单元格进行操作的参照这个）</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * demo这里实现2点。1. 对第一行第一列的头超链接到:https://github.com/alibaba/easyexcel 2. 对第一列第一行和第二行的数据新增下拉框，显示 测试1 测试2</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 注册拦截器 &#123;<span class="hljs-doctag">@link</span> CustomCellWriteHandler&#125; &#123;<span class="hljs-doctag">@link</span> CustomSheetWriteHandler&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">customHandlerWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;customHandlerWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, DemoData.class).registerWriteHandler(<span class="hljs-keyword">new</span> <span class="hljs-title class_">CustomSheetWriteHandler</span>())<br>            .registerWriteHandler(<span class="hljs-keyword">new</span> <span class="hljs-title class_">CustomCellWriteHandler</span>()).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 插入批注</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> DemoData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 注册拦截器 &#123;<span class="hljs-doctag">@link</span> CommentWriteHandler&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">commentWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;commentWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        <span class="hljs-comment">// 这里要注意inMemory 要设置为true，才能支持批注。目前没有好的办法解决 不在内存处理批注。这个需要自己选择。</span><br>        EasyExcel.write(fileName, DemoData.class).inMemory(Boolean.TRUE).registerWriteHandler(<span class="hljs-keyword">new</span> <span class="hljs-title class_">CommentWriteHandler</span>())<br>            .sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 可变标题处理(包括标题国际化等)</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 简单的说用List&lt;List&lt;String&gt;&gt;的标题 但是还支持注解</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 1. 创建excel对应的实体对象 参照&#123;<span class="hljs-doctag">@link</span> ConverterData&#125;</span><br><span class="hljs-comment">     * &lt;p&gt;</span><br><span class="hljs-comment">     * 2. 直接写即可</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">variableTitleWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-comment">// 写法1</span><br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;variableTitleWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName, ConverterData.class).head(variableTitleHead()).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(data());<br>    &#125;<br><br>    <span class="hljs-comment">/**</span><br><span class="hljs-comment">     * 不创建对象的写</span><br><span class="hljs-comment">     */</span><br>    <span class="hljs-meta">@Test</span><br>    <span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">noModelWrite</span><span class="hljs-params">()</span> &#123;<br>        <span class="hljs-comment">// 写法1</span><br>        <span class="hljs-type">String</span> <span class="hljs-variable">fileName</span> <span class="hljs-operator">=</span> TestFileUtil.getPath() + <span class="hljs-string">&quot;noModelWrite&quot;</span> + System.currentTimeMillis() + <span class="hljs-string">&quot;.xlsx&quot;</span>;<br>        <span class="hljs-comment">// 这里 需要指定写用哪个class去写，然后写到第一个sheet，名字为模板 然后文件流会自动关闭</span><br>        EasyExcel.write(fileName).head(head()).sheet(<span class="hljs-string">&quot;模板&quot;</span>).doWrite(dataList());<br>    &#125;<br><br>    <span class="hljs-keyword">private</span> List&lt;LongestMatchColumnWidthData&gt; <span class="hljs-title function_">dataLong</span><span class="hljs-params">()</span> &#123;<br>        List&lt;LongestMatchColumnWidthData&gt; list = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;LongestMatchColumnWidthData&gt;();<br>        <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">i</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">10</span>; i++) &#123;<br>            <span class="hljs-type">LongestMatchColumnWidthData</span> <span class="hljs-variable">data</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">LongestMatchColumnWidthData</span>();<br>            data.setString(<span class="hljs-string">&quot;测试很长的字符串测试很长的字符串测试很长的字符串&quot;</span> + i);<br>            data.setDate(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>());<br>            data.setDoubleData(<span class="hljs-number">1000000000000.0</span>);<br>            list.add(data);<br>        &#125;<br>        <span class="hljs-keyword">return</span> list;<br>    &#125;<br><br>    <span class="hljs-keyword">private</span> List&lt;List&lt;String&gt;&gt; <span class="hljs-title function_">variableTitleHead</span><span class="hljs-params">()</span> &#123;<br>        List&lt;List&lt;String&gt;&gt; list = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;List&lt;String&gt;&gt;();<br>        List&lt;String&gt; head0 = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;String&gt;();<br>        head0.add(<span class="hljs-string">&quot;string&quot;</span> + System.currentTimeMillis());<br>        List&lt;String&gt; head1 = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;String&gt;();<br>        head1.add(<span class="hljs-string">&quot;number&quot;</span> + System.currentTimeMillis());<br>        List&lt;String&gt; head2 = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;String&gt;();<br>        head2.add(<span class="hljs-string">&quot;date&quot;</span> + System.currentTimeMillis());<br>        list.add(head0);<br>        list.add(head1);<br>        list.add(head2);<br>        <span class="hljs-keyword">return</span> list;<br>    &#125;<br><br>    <span class="hljs-keyword">private</span> List&lt;List&lt;String&gt;&gt; <span class="hljs-title function_">head</span><span class="hljs-params">()</span> &#123;<br>        List&lt;List&lt;String&gt;&gt; list = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;List&lt;String&gt;&gt;();<br>        List&lt;String&gt; head0 = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;String&gt;();<br>        head0.add(<span class="hljs-string">&quot;字符串&quot;</span> + System.currentTimeMillis());<br>        List&lt;String&gt; head1 = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;String&gt;();<br>        head1.add(<span class="hljs-string">&quot;数字&quot;</span> + System.currentTimeMillis());<br>        List&lt;String&gt; head2 = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;String&gt;();<br>        head2.add(<span class="hljs-string">&quot;日期&quot;</span> + System.currentTimeMillis());<br>        list.add(head0);<br>        list.add(head1);<br>        list.add(head2);<br>        <span class="hljs-keyword">return</span> list;<br>    &#125;<br><br>    <span class="hljs-keyword">private</span> List&lt;List&lt;Object&gt;&gt; <span class="hljs-title function_">dataList</span><span class="hljs-params">()</span> &#123;<br>        List&lt;List&lt;Object&gt;&gt; list = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;List&lt;Object&gt;&gt;();<br>        <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">i</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">10</span>; i++) &#123;<br>            List&lt;Object&gt; data = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;Object&gt;();<br>            data.add(<span class="hljs-string">&quot;字符串&quot;</span> + i);<br>            data.add(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>());<br>            data.add(<span class="hljs-number">0.56</span>);<br>            list.add(data);<br>        &#125;<br>        <span class="hljs-keyword">return</span> list;<br>    &#125;<br><br>    <span class="hljs-keyword">private</span> List&lt;DemoData&gt; <span class="hljs-title function_">data</span><span class="hljs-params">()</span> &#123;<br>        List&lt;DemoData&gt; list = <span class="hljs-keyword">new</span> <span class="hljs-title class_">ArrayList</span>&lt;DemoData&gt;();<br>        <span class="hljs-keyword">for</span> (<span class="hljs-type">int</span> <span class="hljs-variable">i</span> <span class="hljs-operator">=</span> <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">10</span>; i++) &#123;<br>            <span class="hljs-type">DemoData</span> <span class="hljs-variable">data</span> <span class="hljs-operator">=</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">DemoData</span>();<br>            data.setString(<span class="hljs-string">&quot;字符串&quot;</span> + i);<br>            data.setDate(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>());<br>            data.setDoubleData(<span class="hljs-number">0.56</span>);<br>            list.add(data);<br>        &#125;<br>        <span class="hljs-keyword">return</span> list;<br>    &#125;<br><br>&#125;<br></code></pre></td></tr></table></figure>

<br>
<br>
<br>

<blockquote>
<p><strong><em>写在最后:</em></strong><br>我叫风骨散人，名字的意思是我多想可以不低头的自由生活，可现实却不是这样。家境贫寒，总得向这个世界低头，所以我一直在奋斗，想改变我的命运给亲人好的生活，希望同样被生活绑架的你可以通过自己的努力改变现状，深知成年人的世界里没有容易二字。目前是一名在校大学生，预计考研，热爱编程，热爱技术，喜欢分享，知识无界，希望我的分享可以帮到你！<br>如果有什么想看的，可以私信我，如果在能力范围内，我会发布相应的博文！<br>感谢大家的阅读！😘 你的点赞、收藏、关注是对我最大的鼓励！</p>
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